‏البيوع : Hadeeth No:3758 Ibn Umar (Allaah be pleased with them) reported that Allaah's Messenger (sallAllaahu alayhi wa sallam) contracted with the people of Khaibar the (trees) on the condition that he would have half the produce in fruits and harvest....

‏فضائل الصحابة‏ : Hadeeth No:6072 Ibn Musayyib reported that Hassan said to a circle in which there was also Abu Huraira: Abu Huraira, I adjure you by Allaah (to tell) whether you-had not heard Allaah's Messenger (sallAllaahu alayhi wa sallam) saying like this....